A single strand of DNA contains the following nine nucleotides in this order:

ACT TAT GGA.

What sequence of bases will be present on the complementary strand of DNA?

The question is asking to state the sequence of bases that will be present on the complementary strand of DNA and in my calculation ad further understanding, I would say that the answer would be TGA ATA CCT, A with T, G with C. I hope you are satisfied with my answer and feel free to ask for more

TGA ATA CCT : A and T G and C match together